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Updated: May 24, 2026

In Situ Soil Moisture Sensors in Undisturbed Soils

In Situ Soil Moisture Sensors in Undisturbed Soils

Published on: November 18, 2022

Soil pH mapping with an on-the-go sensor.

Michael Schirrmann¹, Robin Gebbers, Eckart Kramer

¹Leibniz-Institute for Agricultural Engineering, Department of Engineering for Crop Production, Max-Eyth-Allee 100, D-14469 Potsdam, Germany. mschirrmann@atb-potsdam.de

Sensors (Basel, Switzerland)

|February 21, 2012

Summary

This summary is machine-generated.

The Veris pH Manager™ sensor shows potential for on-the-go soil pH mapping in Germany, offering higher accuracy than standard methods. Field-specific calibration is needed, and system blockages must be addressed for efficient liming decisions.

Keywords:

Veris pH Manager™antimony electrode digital soil mapping pH precision agriculture soil sampling soil sensors

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Area of Science:

Agricultural Science
Soil Science
Precision Agriculture

Background:

Soil pH is critical for crop productivity and requires accurate spatial assessment for precision management.
The Veris pH Manager™ offers high-resolution, on-the-go soil pH mapping, recently available in the US.
Evaluating this sensor's performance under German farming conditions is essential for its adoption.

Purpose of the Study:

To evaluate the accuracy and practical applicability of the Veris pH Manager™ sensor in Germany.
To compare on-the-go sensor measurements with standard soil pH assessment protocols.
To identify potential benefits, limitations, and necessary calibrations for the sensor system.

Main Methods:

Controlled laboratory tests.
Semi-controlled transect tests in a stop-and-go mode.
Practical field tests using the sensor in its typical on-the-go mode.
Comparison of sensor readings against standard soil pH assessment data.

Main Results:

A high degree of linearity was observed between standard laboratory pH values and sensor readings.
Under practical field conditions, the regression fit (r²) between on-the-go measurements and reference data ranged from 0.63 to 0.84.
Field-specific calibration proved necessary to mitigate systematic errors.
On-the-go pH maps showed considerably higher accuracy than those from standard protocols.
Error in calculating lime requirements was reduced by approximately 50%.

Conclusions:

The Veris pH Manager™ sensor demonstrates potential as an efficient alternative to standard sampling protocols for on-the-go soil pH mapping.
Field-specific calibration is crucial for optimizing accuracy and reducing systematic errors.
Addressing system weaknesses, such as blockages from straw and roots, is necessary for widespread practical application in Germany.